EP 1866263 B1 20130227 - METHOD FOR PRODUCING NITROGEN FERTILIZER, REMOVING PHOSPHATE FROM ORGANIC WASTE PRODUCTS, AND LIMITING THE POTASSIUM CONCENTRATION
Title (en)
METHOD FOR PRODUCING NITROGEN FERTILIZER, REMOVING PHOSPHATE FROM ORGANIC WASTE PRODUCTS, AND LIMITING THE POTASSIUM CONCENTRATION
Title (de)
VERFAHREN ZUR GEWINNUNG VON STICKSTOFFDÜNGER UND ZUR PHOSPHATENTFERNUNG AUS ORGANISCHEN ABFALLPRODUKTEN SOWIE ZUR BEGRENZUNG DES KALIUMGEHALTES
Title (fr)
PROCEDE DE PRODUCTION D'ENGRAIS AZOTES A PARTIR DE DECHETS ORGANIQUES, DE SUPPRESSION DE PHOSPHATES DE DECHETS ORGANIQUES ET DE LIMITATION DE LA TENEUR EN POTASSIUM
Publication
Application
Priority
- EP 2006002744 W 20060321
- DE 102005017077 A 20050408
Abstract (en)
[origin: WO2006105875A2] The invention relates to a method and a device for producing nitrogen fertilizer, removing phosphate from organic waste products in liquid phase, sanitizing said waste or reducing emissions, and limiting the potassium concentration. According to the invention, the waste product is heated to temperatures ranging between 40 °C and 90 °C at a subatmospheric pressure, the escaping gas that contains carbon dioxide and ammonia is contacted with a mineral-aqueous suspension, the excess gas is conducted within the circuit while the subatmospheric pressure is autogenously stabilized, and the formed nitrogen fertilizer is discharged. In order to additionally produce phosphate fertilizer and limit the potassium concentration, the obtained fertilizer product is divided into the liquid and solid portion, and all or some of the solid portion is redirected into the stripping receptacle while the liquid waste product that is stripped of nitrogen compounds and phosphorus compounds is cooled and mixed with at least one sulfate-containing compound to limit the potassium concentration. Optionally, the viscosity of the waste product is specifically reduced and a very small amount of a basic mineral powder is added thereto. The last solid portion obtained from said treatment can be used directly as phosphate fertilizer, potassium fertilizer, or phosphate-containing and potassium-containing mixed fertilizer.
IPC 8 full level
C05F 3/00 (2006.01)
CPC (source: EP US)
C05B 17/00 (2013.01 - EP US); C05C 3/00 (2013.01 - EP US); C05F 3/00 (2013.01 - EP US); C05F 7/00 (2013.01 - EP US); Y02A 40/20 (2017.12 - EP US); Y02E 50/30 (2013.01 - EP US); Y02P 20/145 (2015.11 - EP US); Y02W 30/40 (2015.05 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2006105875 A2 20061012; WO 2006105875 A3 20070201; CA 2604179 A1 20061012; CA 2604179 C 20110524; EP 1866263 A2 20071219; EP 1866263 B1 20130227; JP 2008534426 A 20080828; JP 5345382 B2 20131120; US 2009078013 A1 20090326; US 8241389 B2 20120814
DOCDB simple family (application)
EP 2006002744 W 20060321; CA 2604179 A 20060321; EP 06723723 A 20060321; JP 2008504647 A 20060321; US 88734106 A 20060321